Dishwashing machine



March 3l, 1931. w. |NDGREN DISHWASHING MACHINE Filed Nov. 5, 1928 5 Sheets-Sheet l March 3l, 1931. W; UNDGREN 1,798,426

DTSHWASHING MACHTNE :21: ....m. i "i" March 31, 1931. w. UNDGREN 1,798,426

DI SHWASHING MACHINE Filed Nov. 5, 1928 5 Sheets-Sheet 3 LLL-E March 3l, 1931. w. L. LINDGREN 1,793,426

DlsHwAsHING MACHINE Filed Nov. 5. 1928 5 Sheets-sheet 4 March 3l, 1931. w L. |NDGREN 1,798,426

DISHWASHING MACHINE Filed Nov. 5, 1928 5 Sheets-Sheet 5 Patented Mar. 31, 1931 UNITED STATES PATENT OFFICE WALDEMAB L. LINDGREN, or WAUKEGAN, ILLINOIS, AssIGNOR OF ONE-HALF To JOHN E. ERICSSON, or CHICAGO, ILLINOIS DISHWASHING MACHINE Application led November 5, 1928. Serial No. 317,176.

My invention is concerned with dish washing machines of the type shown in my applications Nos. 299,485 and 299,486, filed August 14, 1928, and is designed to produce'an apparatus of the class described that is not only driven by a motor, as was the apparatus shown in my application No. 299,485, but which is also removable from the sink, leaving the latter unoccupied and capable of its ordinary use.

I have shown my invention as applied to a modern type of kitchen-sink faucet in which the spout swings horizontally out of the way when not in use, and my present invention resides mainly in the novel construction and connections ofthe spray pipes by which they can be left connected to the faucet, but can be swung out of the way when the frame and carrier are removed from the sink.

It is also concerned with a novel collapsible vcover for the carrier, which permits it to be removed and its supports collapsed so as to occupy little cubic. space.

My invention is further concerned with a novel construction of the soap boxes, an-d also with animproved construction of the carrier by which it can carry spoons, etc., more readily than the old form.

To illustrate my invention, I annex hereto live sheets of drawings, in which the same reference characters are used to designate identical parts in all the figures, of which,-

Fig. 1 is a. side elevation of the apparatus in section on the line 1--1 of Fig. 4;

Fig. 2 is a'. similar view, partly in section, on the line 2 2 of Fig. 4, with portions of the removable mechanism broken away, but indicated in dotted lines; l

Fig.. 3 is a top plan view of a portion of the sink with the spray pipes in their operative position, but with the rest of the apparatus removed;

Fig. 4 is a vertical section on the line 4--4 lof Fig.'1`;

Fig. 5 is a'view, onz a reduced scale, of the exible cover, removed and flattened out;

Fig. 6is a perspective view ofthe collapsible wire framework for the removable 50 cover; v

the line 8-8 of Fig. 7;

Fig. 9 is a top plan view of a portion of the carrier proper, a portion thereof being in central horizontal section;

Fig. 10 is a View of'a portion ofthe mechanisln shown in Fig. 9, but somewhat modified; Fig. 11 is a view in vertical section on the line 11-11 of Fig. 9;

Fig. 12 is a view in vertical section on the line 12--12 of Fig. 9; I

Fig. 13 is a View in vertical section on the line 13-13'of Fig. 10; and i Fig. 14is' a perspective view of one of the links shown in Figs. 9,'11, 12 and 13.

It will be apparent thatI employ the same` general combination as is shown in the aforesaid applications Nos. 299,485 and 299,486: to wit, a skeleton framemade up of two symmetrical side pieces 20 having the two pairs of sprocket wheels 2l and 22 `ournaled therein, and carrying the horizontal endless conveyor 23, upon the upper run of which the dishes are'placed to be sprayed by the hot soapy water from the pipes 24 and 25, and to be rinsed by the clear water from the pipes 26 and 27.

Referring now more particularly to Figs. 2, 3 and 4, the rear wall of the sink 28 has extending therethrough the connections 29 and 30 from which project upwardly and toward each otherthe hot and cold water cock 37 is a necessary addition to the ordinary spout. With the'construotion shown, the spout 38 can be turned outV at right angles to the back wall of the sink, as indicated in dotted linesv in Fig. 3, or turned parallel thereto, as shown in fulllines. g

The mix'er 35 has extending rearwardly therefrom a short pipe 39 which opens into an inverted V-shaped hollow connection 40, which has secured in its lower ends by the connections 41 and 42 the pipes 43 and 44 extending vertically upward. The connections 41 and 42 have the forwardly projecting portions (seen in section in Fig. 4) in which are swiveled, by a rotating valve connection, the pipes 45 and 46, the pipe 45, as

- seen in Fig. 2, opening into the soap box 47,

to be presently described, while .the longer ipe 46 has perforations on its upper side y which ,the rinsing water is sprayed upwardly vthrough the carrier and on to the under side of the dishes, etc., carried thereby. The upper ends of the pipes 43 and 44 have secured thereon' the right-angular connections 49 and 48, somewhat like the connections 41 and 42, and having the pipes 51 and 50, similar to the pipes 45 and 46, swiveled therein. The pipe 51, like the pipe 45, terminates in the soap box 52, similar to the soap box 47. The soap box 52 has secured on its under side the spray pipe 53, perforated on its under side, While the soap. hox`47 has secured to its upper side the spray pipe 54, perforated on its upper side, to wash the under side of the dishes on the carrier, while the spray pipe-53 washes their upper side. When not in use, the pipes 46, 50, 53 and 54 can all be swung around parallel to theback Wa'll of the sink, as indicated in dotted lines in Fig. 3. i

As seen in Figs. 2 and 4, the V-shaped connection 40 has secured on each arm, by a rectangular clamp 55, the hooks 56 which engage the pair of sockets 57 formed on the rear side of the rear side piece 20. The spray pipe 46 and the spray pipe 45, soap box 47 and spray pipe 54 enter ,through the open side as the frame is placed in the sink, and the sockets 57 drop down on the hooks 56 to secure the frame in place, while it is supported by the feet 58 resting upon the bottom of the sink 28.

Referring now more particularly to Figs. 2 and 4, I preferably drive the carrier by a small electric motor 59, the casing of which is bolted through its flanged end to the flanged end of a gear casing 60, into which extends the end of its horizontal armature shaft, which has secured thereon a Worm 61 meshing with a worm wheel 62 in the same gear casing, and secured on the adjacent end of the horizontal drive shaft 63, the other end of which is journaled in agear casing 64 supported from the frame 20, and has secured thereon a worm 65 meshing with a worm gear 66 secured on the shaft 67 journaled in the side frames 20 and having the 'sprocket wheels 21 secured thereto, vso that the comparatively rapid rotation of the i armature shaft is geared down to give a slow rotation of the sprocket .Wheels 21, which drive the sprocket wheels 22 through the carrier construction best shown in Figs. 9 to 14. This carrier is made up of the transverse rods 68 which have the comparatively wide annular grooves 69 in the ends thereof and adapted to co-operate with the links 70, the shape of which is best seen in the perspective Fig. 14, where the. link is seen to consist of a sheet-metal stamping having the elongated slot 71 therein of a width slightly greater than the diameter of the reduced portion of the rods 68 made by the` annular grooves 69, while 4at the center the slot 71 is widened by the generally circular enlargement 72, the diameter of which is suiicient so that the links can be passed over the ends of the rods 68 and drawn into place in a manner which will be readily apparent. This con- .stitutes a simple carrier that can be readily assembled, and likewise readily repaired in case any part gives out.

While the carrier thus far described is adapted for carrying dishes, where it is intended to carry teaspoons, etc., I preferably provide it with additional annular grooves 73 in the rods 68, and I employ wires 74 extending the length of the carrier, and held in place by coiling them once around in each of the grooves 7 3 with which the wire cooperates. With this construction, it will be obvious that the wires 74 can give enough in passing around the wheels 21 and 22 so as not to interfere with the operation of the carrier, and the Wires 74 thus divide the otherwise elongated openings in the carrier into the comparativel short rectangular openings indicated in lgig. 9. Asa possible modification, instead of employing the wires 74 coiled once around each rod 68, I may employ wires 74a, seen in Figs. 10 and 18, cooperating with the narrower annular grooves 73a in the rods 68, and simply engaging one side of each groove, as seen in Fig. 13, instead of completely surrounding it.

To prevent splashing in the upper portion of the machine, I preferably v employ Ethe cover which is shown in Figs. 1, 4, 5 and 6, and as the cover 75, seen extended in Fig. 5, is made of any desiredflexible material, such as rubber-coated cloth, it is necessary to provide a frame for the same, and I preferably employ the collapsible frame shownin Fig. 6, where it will be seen that I place on the side frames 20, near the ends thereof, the four upwardly projecting lugs 76, to each of which is plvoted one of the pair of long wire bails 77 and one of the pair of short wire bails 78. These wire bails are rectangular, as seen in Fig. 1, except for the curves 79 placed therein near their angles, so that the bails can either be turned down flat, as indicated in dotted lines in Fig. 6, or they can be turned up perpendicular, and the cooperation of the curves 79 of the two sets of bailsserves to form a simple locking means by which the bails are held in the position shown 1n Fig. 6. The cover 75 has the side portions Y80, which have at their ends the plurality of snap-button connections 81, so that when the cover is in place, as seen in Fig. 1, these ends of the side portions 80 can be folded. about the vertical portions of the erected bails and snapped in place so as to hold thecover securely. The ends 82 of thereby,

the cover, which hang down, Slotted, as seen at 83, so as to divide the end portions into a number of strips which will yield freely to the passage of the dishes, etc., which are placed on the adjacent end of the carrier from the table 84 supported and removed from the other end of the carrier as they are delivered to the table 85 supported by said other end. The cover 75 has the elongated aperture 86 therein which' permits the spray pipe 53 to extend therethrough to the interior of the cover, and it also has the 4small circular hole 87 in the proper side 80 'so that the spray pipe'27 can project therethrough, as seen in Fig. 1. The tiexible cover, of course, yields to permit it to accommodate itself to the irregularities Whi ch are met in use, due to the construction of the Water distributing portion, as seen in Fig. 4.

I have shown a preferred form of construction for the soap distributinor mechanism in Figs. 7 and 8, where it will seenthat the pipe 51 extends lhorizontally to the center of the outer box 52, where it opens into the top by the port 88. An opposed port 89 on the other side opens into the spraymember 53, which preferably takes the form of an elongated tube chaving the spray apertures 90 in the under side thereof. The casing 52 is integral, and except for the apertures 88 and 89 is closed on five sides, while the sixth side is open and is provided with the flanges'91 and 92. The soap holder proper is another rectan ular casing, having the heavy end 93 provi edl with the flange 94 extending around the same and forming'a seat for the sheet-metal body portion 95, lwhich isv rectangular in cross section. and is providedwiththeapertures 96 near Vthe edges of the top and bottom portions, and

the apertures'97near the edges of the sides. The body portion -isV permanently secured on the end 93, while its otherwise'opeii other end is closed by the thin sheet-metal portion 98 having the sides 99 projecting therefrom and provided With the lugs 100 stamped up therefrom and adapted 'to t in the apertures 101 formed in the body portion 95 when the end 98 is sprung in place after the cake-of soap 102 has been inserted. The flange 91l has pivoted thereto, by the'screw 103, one end of t-he yoke 104, the other hooked end of which cooperates with the flange 92 whenthe yoke is swung into the operative position shown. A rubber gasket is interposed betvveen the flange 94 and the adjacent surface of the container V52, so' that 'when the set screw l106 place,

are preferably threaded through the center of the yoke 104 is tightened up, the yoke is securely held in While at the same time the end 93 is likewise held so as to make a Water-tight joint.

The operation of the complete apparatus will be readily apparent: When the'parts are assembled as shown in full lines, the cocks 33 and 34 are adjusted to furnish Whatever temperature of water is desired, and the Waterpassing through the soap-dispensing apparatus will take up enough of the soap to form a suds for spraying the dishes as they enter the machine, While theclear water from the pipes 26 and 27 will rinse the soap olf and deliver the dishes from the apparatus clean.

While I have herein shown and described a novel conveyor structure,'I do not herein claim the same, as it is covered in my applications Nos. 359,916 and 359,917, iled May 2, 1929.

While I hafve herein shown and described a novel soap holder for dish- Washing apparatus, I do not herein-.claim the same, as it is claimed in my divisional application No. 397,200, filed October 4l929. While I have shown-and described my in vention as embodied in the form which I at present consider best adapted to carry out its purposes, it-Will be understood that it is capable of modiication, and I do not desire to belimited in the interpretation of thel following claims except.v as maybe necessitated by spray. members movably mounted on said sink and connected to the water supply so that they can be extendedtransversely of the line of movement of the carrier when it is in the sink, or parallel and adjacent to the rear wa-ll of the sink so as to leave the latter unobstructed when the frame and carrier are removed.

2. In a dish-washer, a portable frame, a skeleton dish carrier mounted for movement therein, a motor for moving said carrier, a sink removably receiving the frame, hot and cold water cocks, a mixer lconnected thereto, fixed conduits leading from the mixer, vand l spray 'members swiveled to.said conduits so .wall o'f the sink so as to leave vthe latter unobstructed when the frame and carrier are removed.

3. In a dish-washer, the combination with a portable frame, of a skeleton dish carrier mounted for movement therein, means for moving said carrier, a removably receiving the frame, hot and cold water cocks, a mixer connected thereto, fixed conduits leading from the mixer down toward the bottom of the sink, vertical conduits connected to and extending upward from the` fixed conduits, and spray members swiveled to the tops and bottoms of said'vertical conduits so that they can be extended transversely above and below the dishes on the carrier, or parallel to and adjacent the rear wall of the sink so as to leave the latter unobstructed.

4. In a dish-washer, the combination with a portable frame, of a skeleton dish Carrier mounted for movement therein, means for moving said carrier, a sink Vremovably receiving the frame, hot and cold water cocks, a mixer connected thereto, fixed conduits leading fromthe mixer down toward the bottom of the sink, vertical conduits connected rto and extending upward from the fixed conduits, angular connections at the top and bottom of the vertical conduits, and spray members swiveled in said angular connections to that the can be extended transversely above an below the dishes on the carrier, or parallel to and adjacent the rearl wall of the sink so as to leave the latter unobstructed.

5. In a dish-washer, the-combination with a portable frame, of a skeleton dish carrier mounted for movement therein, means for moving said carrier, a sink removably receiving the frame, spray members on said sink and connected to the water sup ly so that they extend transversely of t e carrier, and a flexible covering device for the carrier having apertures therein admitting the spray members extending across the carrier.

6. In a dish-washer, the combination with a portable'frame, of a skeleton dish carrier mounted for movement therein, means for moving said carrier, a sink removably receiving the frame, spray members on said sink and connected to the water supply so that they extend transversely of the carrier, and a liexible and collapsible covering device for the carrier having apertures therein admittingthe spray members extending across the Carrier.

7. In a dish-washer, the combination with a portable frame, of a skeleton dish carrier mounted for movement therein, means for moving said carrier, a sink removably receiving the frame, spray members on said sink and connected to the water supply so that they extend transversely ot the carrier, a coliapsible frame-work on the tcp oi the pertable frame above the carrier, and a f ble cover held extended by said frame-Worx and enclosing the sprav members.

dish-washer, timeframe, ofi for niov ng said carri and connected to the water supply so that they extend transversely of the carrier, a collapsible framework consisting of four rectangular wire bails having indentations at their angles, said bails being pivoted on the top of the portable frame on axes forming a rectangle whereby they may be held locked in their erected position, and a flexible cover held extended by said frame-work when it is erected and enclosing the spray members.

9. In a dish-washer, the combination with a portable frame, of a skeleton dish carrier mounted for movement therein, means for moving said carrier, a sink removably receiving the frame, spray members mounted on said sink and connected to the water supply so that they extend transversely of the carrier, a collapsible frame-work consisting of four rectangular wire-hails having indentations at their angles, said bails being pivoted on the top of the portable frame on axes forming a rectangle whereby they ma be held locked in their erected position, a exible cover held extended byv said frame-work when it is erected, it being held on the framework by four portions thereof being doubled back over the adjacent vertical portions of the wire bails, and snap buttons on said doubled-back portions to secure the cover in place.

lO. In a dish-washer, the combination with a frame, of a skeleton dish carrier mounted for movement therein, means for moving said carrier, means for spraying the dishes on the carrier, a collapsible frame-work on the top of the frame above the carrier, and a flexible cover on said frame-work and held extendedthereby when it is erected. i,

11. In a dish-washer, the combination with a frame, of a skeleton dish carrier ymounted for movement therein, means for moving said carrier, means for spraying the dishes on the carrier, a collapsible frame-work consisting of four rectangular wire bails having indentations at their angles, said bails being pivoted on the top of the portable frame on axes forming a rectangle whereby they are held locked in their erected position on the top of the frame above the carrier, and a exible cover held extended by said frame-work when it is erected.

l2. In a dish-washer', the combination with a frame, of a skeleton dish carrier mounted for movement therein, means for moving said carrier, means for spraying the dishes on the.

carrier, a collapsible frame-work consisting of four rectangular wire bails having indentations at their angles, said baile bein.f,l oted on the top of the portable frame 'mi s forming a rectangle whereby they ma" reid locked in their erected position on e top of the frame above the carrier, a coiffer held extended by said raineo when it is erected, it being held on the framework by four portions thereof being doubled back over the adjacent vertical portions of the wire bails, and snap buttons on said doubled-back portions to secure the cover.

In witness whereof, I have hereunto set my hand this 2nd day of November, 1928.

WALDEMAR L. LINDGREN. 

